Capability assessment of CNC machining centres as measuring devices

Holub, Michal; Jankovych, Robert; Andrš, Ondřej; Kolibal, Zdenek

doi:10.1016/j.measurement.2018.01.007

Cited by 29 publications

(10 citation statements)

References 25 publications

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“…Process in such a state is said to be out of statistical control [3]. Therefore, it is incapable of producing according to specification [15,16]. There are several indicators of process capability.…”

Section: Overview Of Statistical Process Controlmentioning

confidence: 99%

Quality Characterisation and Capability Assessment of a Tobacco Company

Opaleye¹,

Okunade²,

Adedeji³

et al. 2020

AJTAS

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This is an empirical study on the application of SPC techniques for monitoring and detecting variation in the quality of locally produced tobacco in Nigeria. The result provides base evidence for intervention in the quality behavior of the heavily automated tobacco production process in which slight undetected deviation can result in significant wastes. An observational study was carried out within the primary manufacturing department of the tobacco company. The study analysis was conducted using descriptive statistics, goodness of fit test and SPC charts.. These charts were constructed and examined for significant variation in expected output quality as well as the capability of the process. The goodness of fit test and SPC identified CTQs that were approximately normally distributed and out of process control across periods of observations. These deviations were not evident with the summary data or its presentation on the histogram. Subsequently, the out of control process charts were transformed to in-control charts by repetitive elimination of out-of-control instances. At this state, it was observed that the process was only capable of meeting specification for the dust level for all capability measures. These results illustrate a proof of SPC for process monitoring and product quality improvement.

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Section: Overview Of Statistical Process Controlmentioning

confidence: 99%

Quality Characterisation and Capability Assessment of a Tobacco Company

Opaleye¹,

Okunade²,

Adedeji³

et al. 2020

AJTAS

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“…To the best of our knowledge, there is no instrument for directly simultaneously measuring 6DOF geometric motion errors of a rotary axis. There are many kinds of the indirect measurement methods, such as ball bar tests, R test, probing of artifacts, tracking interferometer, and machining tests [19,20,21,22,23,24,25]. These methods can be used to measure geometric motion errors of machine tools, and have the advantages of high measurement efficiency and simple measurement configuration.…”

Section: Introductionmentioning

confidence: 99%

A Method for Simultaneously Measuring 6DOF Geometric Motion Errors of Linear and Rotary Axes Using Lasers

Zheng

Feng

Zhang

et al. 2019

Sensors

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A novel method for simultaneously directly measuring six-degrees-of-freedom (6DOF) geometric motion errors of CNC machine tools was proposed, and a corresponding measurement system was developed. This method can not only be applied for measuring a linear axis, but also for a rotary axis. A single-mode fiber was used to separate the measuring unit from the laser source in order to ensure system thermal stability and measurement accuracy. The method has the advantages of high efficiency and good accuracy, and requires no complicated decoupling calculation. The positioning error of the linear axis and radial motion error of the rotary axis are measured by laser interferometry and other 5DOF geometric motion errors by laser collimation. A series of experiments were performed to verify the feasibility and effectiveness of the developed measurement system.

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“…It should be noted that not all measurements must be performed with the same high accuracy. An alternative to some measurements made with CMMs are measurements made using CNC machines [1]. A set of measuring probes has been standard equipment for CNC machining centers for several years.…”

Section: Introductionmentioning

confidence: 99%

Dimensional Control of Aircraft Transmission Bodies Using CNC Machines and Neuro-Fuzzy Systems

Bomba¹,

Gierlak

2019

Applied Sciences

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The article deals with the selected aspects of quality control of aircraft accessory drive train bodies. The work presents the concept of control of selected dimensional and shape characteristics. The key issue under consideration is the possibility of replacing the coordinate measuring machines (CMM) in selected measuring operations with a computerized numerical control (CNC) machine, which leads to a lower load on the measuring laboratory. In order to determine the relationship between the measurement results on the CMM in an unmounted state and the results of measurements on the CNC machine in the mounted state, a neuro-fuzzy model was used. The problem is presented for a selected component, which is the cover of the transmission body. Detailed analysis, calculations and neuro-fuzzy modelling of the dependencies between the measurement data were carried out for the selected key geometric characteristic, i.e., the bearing seat position deviation. The obtained results are acceptable from the point of view of quality control.

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Capability assessment of CNC machining centres as measuring devices

Cited by 29 publications

References 25 publications

Quality Characterisation and Capability Assessment of a Tobacco Company

Quality Characterisation and Capability Assessment of a Tobacco Company

A Method for Simultaneously Measuring 6DOF Geometric Motion Errors of Linear and Rotary Axes Using Lasers

Dimensional Control of Aircraft Transmission Bodies Using CNC Machines and Neuro-Fuzzy Systems

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